Hey,
So I got another 2 error/ glitch.
(In Game) One is when I look up to a certain part in the sky every thing goes black but I can see all of the hud, my gun and viewhands.
View My Video
(In Radiant) Two is a when I place a light a weird box appears, and when in game the lights don't work.

1. your using the model version of the skybox, add the KVp to worldspawn: skyboxmodel  then (sky name) so for example skyboxmodel pel2

2. That's pretty normal, happens to me also. You should be able to see the light in game, and also since your seeing black it seems as if you don't have a big hollow chalk box surrounding your map with a sky texture applied to all of the interior faces.

1. your using the model version of the skybox, add the KVp to worldspawn: skyboxmodel  then (sky name) so for example skyboxmodel pel2

2. That's pretty normal, happens to me also. You should be able to see the light in game, and also since your seeing black it seems as if you don't have a big hollow chalk box surrounding your map with a sky texture applied to all of the interior faces.

I was thinking it was the sky box but I never tested it, cheers.